> ... Are they the same engines though? The answer is we don't know. SpaceX have not published much detailed information about exactly what they do during boos

> ... Are they the same engines though? The answer is we don't know. SpaceX have not published much detailed information about exactly what they do during booster refurbishment, how much is simply inspected, how much is replaced and how much is "swapped out". The fastest turnaround for a booster is 21 days (and plenty have been less than 30). [1] [1] https://en.wikipedia.org/wiki/List_of_Falcon_9_and_Falcon_Heavy_launches https://en.wikipedia.org/wiki/List_of_Falcon_9_and_Falcon_He...